Superheater.



Patented Aug. 4, 1914.

2 SHEETS-SHEET 2.

G. H. EMERSON Y H. YORRG.

SUPIRHEATER. APPLICATION FILED DFG. 18, 1900.

UNITE STATES PATENT OFFICE.

GEORGE H. EMERSON AND HENRY YOERG, OF ST. PAUL, MINNESOTA, ASSIGNORS T0 LOCOMOTIVE SUPERHEATER COMPANY, A. CORPORATION OF DELAWARE.

SUPERHEATER.

Specification of Letters Patent.

Patented Aug. 4, 1914.

Application filed December 18, 1909. Serial No. 533,955.

To all whom it may concern Be it known that we, Gsonor. H. EMEnsoN and HENRY yYonne., of St. Paul, Ramsey county, Minnesota, have invented certain new and useful Improvements in Superheaters, of which the following is a specification.

Our invention relates to superheaters de signed particularly for use in the smoke box of a locomotive and arranged to receive saturated steam from the dome and superheat it before delivery to the cylinders.

The object of our present invention is to simplify and improve the construction of superheater shown and described in our pending application filed January 20, 1909, Serial No. 473,235.

Our invention consists generally in providing external lugs or bosses on the superheater header communicatinr with the compartments in the header andjhaving sockets t0 receive the ends of the superheater tubes, and means whereby the said ends are rendered accessible for removal or repairs.

Further our invention consists generally in various constructie s and combinations, all as hereinafter descrribed and particularly pointed out in the claims.

In the accompanying drawings forming part of this Specification, Figure l is a front elevation of a super-heater showing its application to the boiler lues, Fig. 2 is a sectional view through one of the headers of the superheater, illustrating the arrangementof the compartments therein, Fig. 3 is a transverse, sectional view of a superheater header.

In the drawing, 2 represents a locomotive boiler having a flue sheet 3 and smoke-box 4. The boiler is of ordinary or any preferred construction and is provided with the usual lues 5 and with a series of flues 6 of greater diameter to adapt them to receive the superheater tubes or coils. The flues 6 are suitably located in the flue sheet and correspond substantially to those usually employed in connection with a superheater.

7 represents the casting or header. as we prefer to term it, forming the main portion of the superheater. There are preferably two of these castings, one on each side of the middle portion of the boiler and connected at their upper ends through a coupling 8 with a pipe 9, which leads from the steam dome. Through this pipe the saturated steam is-supplicd to the superheater.

The superheater sections or headers are of substantially the same construction and a description of one of them will sufiice, the other header being indicated by the same reference numerals with the addition of the eX- ponent a. The lower ends of the headers have connections 10 with the steam chests of the locomotive cylinders. W'ithin the superheater headers longitudinal steam chambers 1l and 12 are provided. The chalnber 11 communicates with the pipe 9 and receives thesaturated steam therefrom and conducts it to the lower end of the superheater. The lower end of the chamber 11 is closed to the escape of steam.` The section or header is provided with a series of external bosses or lugs 13 and 14 formed preferably on the wall of the casting upon opposite sides of the middle line thereof, though they may be located in any other preferred position, and said bosses or lugs have sockets 15 therein, which communicate through ports 17 and 18 with the chambers 11 and 12 respectively. The superheater tubes 19 are looped in the usual way and inserted into the enlarged flues and the ends of the tubes are fitted into the sockets 15 and rolled therein, as indicated in Fig. 3. The saturated steam entering the Fig. 3. The saturated steam entering the lchamber-11 and flowing downwardly therethrough, will pass through the ports leading from said chamber to the sockets in the bosses or lugs and entering the superheater tubes will be conducted therethrough into the dues and around the loops in the tubes to the opposite ends of the tubes, where the superheated steam will be discharged into the other chamber 12 and from thence conducted to the cylinders.

The ends of each superheater tube are connected through the bosses or vprojections with the superheater chambers on the same side of the superheater header or casting, so that, when a tube is to be removed it is only necessary to disconnect the ends thereof from the sockets or pockets in the bosses, swing the ends outwardly to clear the casting and draw the tube out of the flue sheet. In superheaters as generally constructed it is necessary to remove the header or casting before the tube can be withdrawn from the lues. J

It, is frequently necessary to remove a superhea-ter tube for substitution or repairs and to accomplish -this without disturbing the other tubes or the superheater sections we provide plugs 20 tapped into the Walls of the bosses or lugs opposite preferably the rolled ends of the superheater tubes, so that. when a plug is removed the end of the tube will be exposed and a tool may be inserted into the socket to cut out the end of the tube therein. All this can be performed through the front of the smoke-box where all of the tubes will be accessible and removable. l/Ve are thus able to out out any superheater tube and replace it with a new one Without disconnecting the header joints and disturbing the other tubes. rlt`he header sections are preferably formed of a single casting with joints at the top and bot-tom, both of which are exposed and easily accessible. By providing this minimum number of joints we are able to greatly simplify the construction of the superheater -and reduce the annoyance and delay arising from leaking joints.

We do not wish to be conined in this application to the particular arrangementof the headers or the location of the bosses or lugs thereon, as various modifications may be devised and will suggest themselves to any one skilled in the art, all Otwhich will be within the scope oit our invention.

Ve claim as our invention:

l. A superheater header having saturated and superheated steam chambers formed therein and external bosses formed onthe side walls of said steam Chambers and' pro jecting laterally therefrom and separated from one another and having sockets oommunicating with said chambersrespectively, the bosses communicating with one chamber being staggered with respect to those comnicating with the other chamber on the same side, whereby all of the bosses on the same side will be exposed and accessible from the front of the header, and superheater tubes communicating. with said chambers on each side of said header through said sockets..

3. A superheater comprising, in combination, a header having saturated and superheated steam chambers therein and two rows of external, longitudinally arranged bosses on each side thereof, said bosses being separated from one another and having transverse pockets therein. passages connecting the pockets in one row of bosses with one of said chambers and the pockets in the other row of bosses on the same 'side of the header with the other chamber, and superheating tubes having their ends communicating with said chambers respectively through the pockets on the same side of said header.

ln witness whereof, we have hereunto set our hands this Fifteenth day of December,

GEO. H. EMERSON. HENRY YOERG. liVitnesses E. lW. liftcELRo'Y, el. E. PRATT. 

